Fatigue span of pavement is predicted by judging damage factors and varied crack length.

损伤因子和裂缝长度的变化趋势相似，均可以用来评价路面的疲劳寿命。

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The probability fatigue life - span of pressure vessel under the action of different cycle load is closely related to the cycle load with high stress.

承受不同循环载荷共同作用的压力容器，其概率疲劳寿命和在高应力水平上的循环载荷有着密切的关系。

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The first frequency method of estimating the fatigue serviceability on small and medium span railway concrete bridge is discussed in this paper through three piece test beam under fatigue load.

通过三片模拟梁试验实测结果，探讨了基频法评估铁路桥梁疲劳使用性能的可行性。

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The executive summary of the 2001 Minnesota Department of Transportation report -- undertaken by the University of Minnesota's Department of Civil Engineering -- points to fatigue problems with the bridge's approach span, the segments that connect the main span of the bridge to land.

CNN: States warned to inspect bridges